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Modern Comfort Heating and Cooling is Carroll County’s home heating and cooling specialist. We provide installation and service for all types of heating and air conditioning systems including oil, propane, gas, electric and geothermal systems.





Water Furnace





Through Tevis Energy’s Customer Loyalty Program, customers enjoy discounts of up to 6% on oil tanks, oil, or propane equipment based on their years of service with Tevis Energy
1-4 years: 2% discount
5-9 years: 4% discount
10+ years: 6% discount


Whether you heat with oil, propane, natural gas, electric, geothermal or radiant heat, Modern Comfort Systems provides expert service and installation of all types of home comfort systems, including heat pumps, air conditioners, hot water heaters and oil tanks!

Modern Comfort Systems is an factory authorized dealer of: Lennox, Carrier, Buderus, Burnham, Weil-McLain, Water Furnace, Roth Oil Tanks and Vilco Oil Tanks. All company products provide leading-edge technology to give you the most comfort and value for your hard-earned dollar!

“One-year-same-as-cash” bank financing makes upgrading your system affordable!

We support a wide variety of products, including: air conditioners, heat pumps, furnaces, boilers, geothermal systems, radiant floor systems, hot water heaters and oil tanks.

Air Conditioners

Air conditioning (often referred to as AC) is the removal of heat from indoor air for thermal comfort. Today’s high efficiency air conditioning systems provide better cooling and dehumidification. Real conditioning of the air in your house also means adjusting the humidity levels and keeping the air clean. The efficiency of these systems is rated in “EER” or “SEER.” EER is the “energy efficiency ratio,” which relates the amount of cooling delivered to the energy used. For example, a unit with 20 SEER uses substantially less power than a 10 SEER unit. SEER simulates an actual cooling season, since not all days have the same weather.

Electric Heat Pumps

Electric Heat Pumps

Heat pumps use electricity to move heat from a cool space into a warm space in the indoor environment. During the heating season, heat pumps gather heat from the cool outdoors and “pumps” it indoors to your home. In summer, it operates as a conventional air conditioner to cool your home. To make this happen, Heat Pumps consist of two units (outdoor and indoor) along with a wall thermostat that automatically controls the air temperature in your home. The outdoor unit contains the compressor, outdoor coil, and fan – just like your existing central air conditioner. The indoor unit resembles a warm air furnace and contains a coil, blower, supplemental heaters and air filter.

Oil Fired Boilers

Many homes use oil fired boilers for heating water. This water is then circulated through a system of pipes and radiators in order to warm up the enclosed areas in the buildings. The oil is mixed with air and burnt to provide heat that is accepted by a heat exchanger and transferred to the water in the exchanger. In an oil fired hot water boiler the heat exchanger is a tightly coiled copper pipe which is exposed to the heat of the flame created by burning the oil and air mixture. The copper pipe presents a relatively large surface area to the heat and the water flowing through it is heated. To create the flow of water, a pump is used.

Oil Fired Hot Air Furnaces

Oil Fired Hot Air Furnaces

An oil-fired, forced-air heating system consists of a burner fed by heating oil, usually from a storage tank inside or outside the house, firing into a combustion chamber in the furnace. A circulating fan passes cool house air from the cold air return ducts over the furnace heat exchanger, where it is warmed up, then moved into the hot air ducts, which distribute the heated air throughout the house. Oil-fired furnaces and boilers present an opportunity to use renewable fuels to heat your home. A number of companies are now offering heating oil blended with biodiesel, allowing their customers to reduce their dependence on foreign oil while drawing on a domestic energy source. The biodiesel blends also produce less pollution than pure heating oil.

Oil Tanks

If your home or the home you are buying is currently being heated with heating oil, then an oil storage tank is present on the property. Heating oil may be stored in either an aboveground or underground tank. When the heat is turned on, oil that is stored in the tank flows through copper or steel pipes to the furnace where it is burned. A properly installed and maintained tank can provide decades of safe and reliable fuel storage. We sell and install the highest quality tanks, all of which are backed by manufacturer warranties. Tevis Oil and Modern Comfort Systems earn high praise from customers and builders, alike, for on-time installation, unmatched attention to detail, and professionalism.

Propane Heat Systems and Natural Gas Fired Boilers

Propane and Natural Gas Fired Boilers

Propane and natural gas fired boilers are used in residential homes to provide hot water or steam heat. Propane or natural gas is pumped to a point under the boiler where it fuels a flame. The flame heats the water in the boiler to produce hot water which is then pumped throughout the home to provide heat through pipes in the home. While gas furnaces--which force heated air--are becoming more common, boilers are still considered efficient, and are widely used. One distinct advantage of having a boiler is the ability to heat separate rooms with thermostats, versus the entire building.

Propane Heat Systems and Natural Gas Fired Hot Air Furnaces

A propane or gas furnace (heated by combustion of propane or natural gas) pushes out hot air which is distributed via ducting (duct work) to room vents. A climate-control device (Thermostat) regulates and controls the usage of the furnace. A digital thermostat can be programed to activate the furnace at certain times. For example, a resident may want the temperature in their dwelling to rise 15 minutes before returning from work. This will conserve energy, expenses and natural resources. The natural gas is usually fed to the residence from a main gas line submerged a few feet beneath the earth, most likely running under and parallel to a street. Propane is a clean burning fuel with no contaminants, that may be transported and stored in a special pressurized steel tank (which requires safety testing every few years). The duct work supplying the hot air (and sometimes cool air if an Air Conditioning (AC) unit is also tied into the system) can be insulated, or not insulated.

Geothermal Systems

WaterFurnace Geothermal

Reduce your carbon footprint and utility bills at the same time. A geothermal heat pump uses the ground you already own to heat and cool your home. It’s the most efficient way to heat and cool, not to mention it’s environmentally friendly. Find out what a WaterFurnace geothermal system can do for your family.

  • 30% Federal Tax Credits Available
  • Save up to 70% on heating, cooling,
    and hot water costs

Geothermal systems can be installed in a variety of homes - new or old, large or small, in warm climates or cold. Thanks to the Economic Recovery Act, there’s a 30% “renewable energy” tax credit for homeowners. Give us a call at 410-876-2200 to learn how a geothermal system will improve your home’s efficiency.

Tankless Hot Water Heaters

Tankless hot water heaters provide an endless amount of hot water when you need it. It is not limited to the size of the storage unit, and since it only heats water when you turn on the faucet, there is no wasted energy keeping the water in the storage tank hot while you are not home or sleeping or even on vacation.  Typical energy savings can be as high as 40% and the life of a tankless system can be more than double the life of a conventional hot water heater.

Radiant Floor Heat Systems

Radiant heating systems involve supplying heat directly to the floor of a house. The radiant floor heating systems depend largely on radiant heat transfer: the delivery of heat directly from the hot surface to the people and objects in the room via the radiation of heat, which is also called infrared radiation. Radiant heating has a number of advantages: it is more efficient than baseboard heating and usually more efficient than forced-air heating because no energy is lost through ducts. The lack of moving air can also be advantageous to people with severe allergies.

Hot Water Heaters

Today’s water heaters have a quicker recovery, which makes them more efficient. We handle a complete line of gas, propane and electric water heaters as well as the tank-less systems. Geothermal hot water heaters are also available with geothermal heat systems.